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@uiten gister gattini @fitte DAVID N. n. CoFFIN, JR., or BoS'roN, MASSACHUSETTS, ASSIGNOR lTo HIMSE-LF ANDIRAH D. SPAULDING, or 13H13 SAME PLAGE..

Letters .Patent No. 66,299, dated July 2, 1867,

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mtrnovrby GAPSTAN.

T0 ALL WHM 1T MAY CONCERN:

Be it known that I, DAVID N.- B. COFFIN, Jr., of Boston, inthe county oi" Suffolk, and Newton, in the county of Mddlesex,'and State of Massachusetts, have invented certain new and useful improvements in Cap- Stans and Windlasses, of which the following is a full and exact description, reference being had to the accompanyng drawings, and to the letters of reference marked thereon. With reference to the dra-wings- Figure 1 is a general sectional elevation of a capstan4 on the upper deck, connected on the plan of my improvement patented in 1866, with vertical windlasses` on the lower deck.

Figure 2 is aperspective view,showing one of the many ways of applying my present `Aimprovement, viz, Iinterposing an elastic element between the parts bearing the paivl-pockcts -and thc barrel to relieve the suddenness of the stress on the pawls and parts operated onby them, I Y Y Figure 3 is atransverse section through the barrel, side-shafts, journal-rollers, and spindle, illustrating my improved journal-roller arrangement, which `is applicable both to thc geared and the simple capstans r Figure 4 is a sectional perspectivelview 'of the fulcrum-gear, showing not only the inclined-surfaced lugs of my 1866 patent, but also the adjacent inclincs which form the-subject o one feature of my present improvements. v

i Figure 5 is a view oi" the same, illnstrat'ingthe arrangement of the` bolt, said inclines, and their operation, 85e.

Figure 6 shows one of the several modes of applying' my improvement, in jointing .the pawls by `casting process alone, to the capstan-barrel or windlass. i l l Figure 7 shows a modification of the retaining device in the same.

'Figure 8 shows another, in which the journal part is cast-on the pawl instead'of the barrel, and. the socket in the barrel. i

Figure 9 is still anothermodication of this improvement in therapplication of pawls.

Figure 10 shows the centre first moving gear of a capstan, illustrating my improvement,4viz,castinglor otherwise forming lugs o r a clutch on it to automatically clutch orlock intoV a corresponding clutch or lugs cast orotherwise formed in the lever-head whenever the head is put on.

Figure 11 shows a method of operating the locking-bolts of a capstam which is further illustrated in the base of the lower part of hg. 1. My improvement in. this point will allow the bolts to lock automaticallyin either direction, at pleasure, or in neither, and to, slide over `automatically in the direction opposite'to that inl which it locks. l I i Figure 12 shows my improved mode of conducting the cable or line cica-r of the incoming portion.

Figure 13 shows theautomatic clutching arrangement between the head and barrel 'in the case of aisimple or ungeared capstan. l

Figure-14; shows,.together with Figure 19, a modeofnutomatically locking together the-part carrying the pawlfpockets and the bed-plate, so'as to leave them Ifrec, to movesomewhat about-their centre, subject to an elastic resistance with reference to each other. i

Figure 15, another mode of locking the same.

Figure 16 is aplan, and i Figure 17 a sectional elevation of another plan of locking the same parte.

" Figure 18 shows a method of securing both parts yunder the same conditions by means of the bolts which secure the bed-plate to the deck or other foundation. x Figure 20 illustrates my improvement in applying a differential windlass to strain and vrelieve the frictionband for controlling the windiass'in giving out or paying out cable or Aline,vand applicable to both a vertical and a horizontal windlass.

Figure 21 shows another arrangement of thesame improvement, and also a bearer between the shaft and frictiomwheel in the shape of, or nature of, a bearing for the shaft, and brake-shoe for the friction-wheel, and combined in one.

Figures. 22 and 23 are two viewsillnstrating my improvement in `the mode of locking and. unlocking the several barrels to and from the friction-wheel, or to and from eachother, as the case may be. Another mode, l

or modification of the mode, isshownin iig. 1, loweiwdeck windlass.

Like letters refer to similar, like, or corresponding parts in all the figures.

Als the windlass or capstan-barrel, and has cast to it the wrists or journals a,-with retaining heads b; or the journal a may be on the pawl. A socket, c, is cast in the pawl or in the barrel. This socket has a retainer for the pawl, (see d.) The pawl is applied in a position parallel to the axis; and when the caps'tan-barrel is brought 'down to its proper position, the pawl, being turned up, cannot get down, and conscquentlycannot come od', as the downward and parallel position is the only one where it can be applied or removed, (see'iigs. 1, G, 8, and 9.) -Fig. 7 shows it adapted to be appliedor removed in either the upward or downward positions. The pawls can be thrown and operated in either direction, to the right or left. The pawls are arrangedto play inpockets, formed of a circular or annular groove, divided by the stops or bridges e, against which the pawls act. The spacesin the groove between these bridges e are the pawl-pockets, and have a curved section at their bottom. This curved bottom not only gives symmetry and beauty to the design, but servies te direct the pawl as it pressesdown inaction to its centre or deepest point, and so avoids any side strain against thc rims of the pockets. It also conveys the water more readily to the outlets in its bottom.4 In .the base of barrel B are arranged the sliding-bolts f, which act as pawls to detain or lock barrel B with ,reference to bed-plate C. In barrel B these bolts, one, two, or more, are enclosed from view, but for the side openings-g made to give access to' them. Through these side openings theymay be seen and lifted or pricd up or down by means ofva notch in the side of the boltfor that purpose. Lock-notches L, igsdl and 11, are formed ou thc bed-plateby casting or otherwise; and beside them are arranged theinclined lifters two and two, sloping in opposite directions or reverse order, with ailat elevation, j, between. When the 'elevation j is against thelock-notch h the bolts' may slide freely over them but when one set of incline's,i'as in fig. 11, is made to match one setl of angles the bolts may slide down and catch when moving in one direction, while they -will slide up and over in going to. the opposite direction. So if the other reversedinclines are placed to match thc other angle the reverse of these latter results occurs. These inclines are connected together and are operated by moans of a'mover, 7c. To connect and disconnect the barrels B" and D to and from the friction-wheel E, which is arranged between them,.I form `by casting or otherwise a slanting socket and bolt, 'Z, the slanting or inclined socket having alc'ounterpart, or socket or shoulder, inthe adjacent barrel or wheel, as m. The bolt is movable radially, and on being drawn is vthrownilito socket or between shoulders m, and the two' parts are locked. On being pushed back toward the centre again they are released, as shown iig. 1; or th'e'dcvice may be modified or changed to that show n'in s Yi'gsf22 and 23, where the bolt n is made to slide radially in a retaining groove in part D, and when pressed toward the centre moves in a recess in E; but when drawn radially locks against shoulder o, when D and E thereby become locked together. When pressed toward the centre again in recess p the parts'D and E are againvfree to move independent of each otber,lrecess p being a continuous orannular one. A sheave or roller,

g, is arranged with its axis. obliquely to the axis of a capstan or windlas s s'o as to conduct the delivered cable or line to one'side of the incoming portion, (see iig. 12.*) When the delivered portion is from the top the red li'nes represent'it; when from' the bottom, the black lines. In fig. 1 and iig. 3 is shown a' series of rollers, lr, arranged around the spindle and within the barrel. When these are used the part of the spindle o n which they bear, and the-part ofthe barrel on which-theybear, as well as the rollers themselves, may all be oi`-unfinislred vcast metal.;r The rollers may be conical, as shown, or cylindrical. -The rollers may be cast hollow or solid. v A shoulder, s, in thebarrel bears on one end of the rollers, while the other cnd ofthe rollersbcars on shoulders t on the spindle or bed-plate. The endwiso thrust may, however, be taken otherwise than on the rollers, if-prelferred. Fig. I (upper deck) shows thefulcrum-gear F, furnished with sockets to receive the bolts `for locking Y the gear. Under these bolts u is arrangeda ring, o, for lifting them and holding them up when not required to takeonfthe lugs 'w on thebed-plate. Inclinedlifters are formed on the under side of this ring 'v for lifting it, or on` thel ring :aas-in other cases, the ring 'u being prevented from turning by notches or shoulders against the guide y.. Iniig. 2 Gare springs or elastic substance interposed Abetween any suitable part on 'the stationary portion of the bed-plate and that part, H, divided or separate from it, and bearing the pawl-pockets and suitablyformed parts thereon, to be acted on lby said elastic substance or springsv Gr. Iart H may be4 held to the fixed part L in anyfsuitable manner to' allow it to move somewhat, under control of the resisting' spring'or elastic substance G. Several modes are shown. In lever-head M is. cast a clutch corresponding to that shown 'onf' the centre-gear in iig. 10 'land fig. 1,'s'o that when the lever-head is slipped .down to its place o n the spindle the gear is thereby automatically clutchedjto it. Concentric or annular flanges oriribs are cast on the bed-plates. of the capsta-ns and'windlasses, (see 1,)'N. These flanges N give''all necessary strength, with some elasticity, and without the liability .of fracture, so common to the radial flanges in common use. A small windlass-barrel, P, with two sizes ot' winding surfaces, is arranged to^receive connections from the two-ends of a friction-strap or band, Q, so that by turning the crank or other attachment vthe differential action furnishes a powerful and JK easily-managed strain upon the friction-barrel D through strap Q, which may also be easily relieved by turning in thelopposite direction: It isa bear-ing for shaft I or T, and' at the same time a' friction-shoe for the frictionwheel E or D. In the chain-,wheel B- are formed radial sockets, below the bottom of the groove, and extending up its sides. In these sockets are arranged the chainlugs U', spanning the groove, and made adjustable radially,

to 'dt differentchains. They may be adjusted by. putting blocks behind them, or by means of the keys z, shown.

These keys may be straight,or 4conform to an annular groove 'in thethroat of the wheel; or these chain-lugs may be adjusted radially and held vby screws.

Having described my improvements, what I 'claim as my invention, and desire to secure by Letters Patent is as follows:

1. The application of pawls to a capstan by means of a cast joint or hinge, in any manner so as to allow the pawl to operate in both directions. i

2. The employment of a side opening, g, in combination with the enclosed bolt, in the construction of a capstan.

3. The arrangement'of inclined lifters, made movable, in combination with the lock-notches or spaces h, so as tobe used both to slide the bolts out of connection automatically, and also at the pleasure of the operator.

4. The arrangement of inclined lifters 'it' in duplicate and in reverse order, in combination with lock-notches or lugs and sliding-bolts. Y

5. The arrangement of anelevated Hat part, j, between two inclines, arranged'in reverse order, substantially as and for the purpose set forth.

6. Radially-sliding keys or'holts, in combinationwith a retaining socket in one part, and a locking space or shoulder in another of two parte of a capstan or windlass, to 'be connected and disconnected,.substantially as described.

7. A roller or sheave, arranged, with4 its axis, obliquely to the windlass and its axis, substantially'- as described. v

8. The employment of conical or cylindrical rollers, arranged in combination with the spindle and barrel off a capstan or Windlass, to relieve the friction incident to the sideA or transverse thrust, substantially as described.

9. The arrangement of rollers longitudinally between the shoulder ofthe barrel and that ofthe spindle or bed-plate., to sustain or support tlie barrel endwise. v

10. The arrangement of sliding-bolts in sockets `onV the fulcrum-gear, as described.

' 11. The lifting and sustaining ring v, in combination with the bolts or locking mechanism of a capstan and inclined lifters, arranged either on it or an auxiliary part, a'. Y

12. The employment of an elastic or spring element interposed between the part bearing the pawl-pockets and thc Jfixed portion of the bed-platec 13. The inclines X, for automatically lifting the fulcrum-gear, substantially as shown.

14. Locking orclutching` the centre or iirst moving gear of a capstan to the lever-head automatically by interlocking lugs formed on cach, substantially as described. i

. 15. The arrangement of a concentric, circular, 7or annular 'ange or rib, or iianges or ribs, N, between the spindle or hub and the rim or periphery of the bed-plate of a capstan or windlass, substantially as described.

16. The arrangement of a friction-wheel between-the two barrels of a capstan -or windlass7 with provision for` connecting or disconnecting it to or from one or both, at pleasure.

17.' The application of the differential windlass to the friction mechanism oi`- a capstan or windlass.

18. The employmentiof thecombined bearingand brake or friction-shoe in the friction mechanism of a capstan or windlass. i

19. The employment of chain-lugs, spanning the groove in thc chain-wheel, and made adjustable radially inl sockets at the bottom, and extending up the sides of the groove between the two checks of the chain-wheel, substantially as described.

20. The employment of keys back of said lugs, with or. without the circular forni, substantially as described. u

D. N. B. GOFFIN, JR.

Witnesses:

DANA B. HANsoN,

R. R. Bisnor. 

